Pump sealing and testing device



Dec, 30, 1924.

I o. H. DORER PUMP SEALING AND TESTING DEVICE Filed Jan. 10, 1921INVENTOR BY .ms ATTORNEYS Patented Dec. 30, 1924.

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i ii" a OSCAR H. DOB/EB, OF NE-IVARK, NEW JERSEY, ASSIGNOR TO9V0It'lll-IIJXIGT0N PUMP AND MACHINERY CORPORATION, OF NEW YORK, N, '1 ACORPORATION OF VIRGINIA.

PUMP SEALING AND TESTING: DEVICE.

Application filed January 10, 1921.

T 0 all whom may concern.

Be it known that I, OSCAR H. Donna, a citizen of the United States,residing at Newark, county of Essex, and State of New Jersey, haveinvented certain new and useful lmprovements in Pump Sealing and TestingDevices, fully described and represented in the following specificationand the accompanyingdrawings, forming a part ofthe same.

This invention relates to improvements in devices for liquid sealingpump bearings and determining the amount of leakage into the pump.

It is the especial object of the present invention to provide a deviceof this character which will efficiently seal the pump against airleakage and indicate the amount of sealing leakage. The invention isespecially applicable to pumps used in sugar manufacture, or elsewhere,where a number of such pumps are used in a single system, so that whenleakage in any pump is so great as to be detrimental to the product orefficient operation of the plant, the pump may be quickly located andrepacked or otherwise repaired. I aim to provide such a device which maybe readily applied to pumps of standard design, or to old pumps, and toso form the liquid-holding receptacle and its supporting means that lossof the measuring liquid in any way is prevented except by leakage intothe pump.

For a full understanding of they inven tion, a detailed description of apreferred construction for carrying the same into effect will now begiven in connection with the accompanying drawings, and the'novelfeatures thereof then be specifically pointed out in the claims.

In the drawings Figure 1 is a side elevation, partly in section, of myimproved device shown in connection with a single stage centrifugal pumpof standard design;

Figure 2 is a section on the line 22 of Fig. 1;

Figure 3 is a section on the line 3-3 of Fig. 1, and

Figure 4 is a vertical section on the line 4-4 of Fig. 8.

Referring now to the drawings, and particularly to Fig. 1, A indicatesgenerally a single tage centrifugal p mp of Well Serial No. 436,081.

knowntype, B the impeller shaft thereof, and C the casing of one of theoutside bearings of the pump shaft.

In order to accurately determine the amount of leakage into the pumpthrough which the pump shaft passes, this receptacle being mounted on abrass or other suitable metal bushing 12 having a number of radialperforations 13 communicating with the intenor of the receptacle 11,such bushing forming in effect an extension of the stuffing box.Arranged in the stuffing box are the usual packing rings 1, such ringsbeing separated by a distance piece 2 at a point radially in line withthe openings 13 in the bushing 12, so that the shaft B, where it passesthrough the receptacle 11, is freely accessible to the liquid in thereceptacle at the point where such shaft enters the packlng rings oneach side of the distance piece 2.

The gland 10 is preferably and as shown a split gland, the parts ofwhich are held together by bolts 3. Swing bolts 4 pivoted to the pumpcasing by bolts 5, seat in recesses in the edges of the gland sectionsand, through the medium of nuts 6 hold the device securely in positionand at the same time place the packingrings under proper compression,while the gland parts may be released for removal by loosening nuts 6and swinging the bolts 4 outward, thus permitting the receptacle 11 tobe moved longitudinally of the shaft to facilitate repacking. The sidesof the receptacle 11 have formed therein U-shaped openings through whichthe bolts 4 pass, thus preventing turning of the device on rotation ofthe shaft. On the bolts 4 are nuts 7 for holding the receptacle 11 tightagainst the pump casing.

The receptacle 11 may be drained by removal of the screw plug 8, whichis readily accessible through an orifice 9 in the bearing supportingextension of the pump frame.

It will be observed that due to the small shaft area exposed to thewater, taken in connection with the distance piece and the smallopenings in the bushing 12, and the height of the sight opening in thetop of such receptacle from the shaft, there is no danger of any of themeasuring liquid being thrown off by centrifugal force on rapidrevolution of the pump shaft.

Vhat is claimed is:

1. A liquid sealing and leakage testing de vice for centrifugal pumpsand the like, comprising a liquid receptacle surrounding a stuffing boxpacking, a distance piece interposed in said packing and arranged topermit access of liquid in said receptacle to the pump shaft, and meansfor holding said re ceptacle in place with its interior radially in linewith said distance piece, said means including members arranged to opento permit said receptacle to. be moved longitudinally of the shaft foraccess to said packing.

2. A liquid sealing and leakage testing device for centrifugal pumps andthe like, comprising a receptacle surrounding a stufiing boX packing, aperforated bushing between said packing and said receptacle, a distancepiece interposed in said packing at a point radially in line with theperforations in said bushing to permit access of liquid in saidreceptacle to said shaft, a packing gland on the outside of thereceptacle, and means for '35 holding the receptacle in place.

3. The combination with a pump and its outside bearing and stuffing boxbetween the bearing and pump, of a liquid receptacle 11 forming a partof the stufiing box and having packing on both sides of said liquidreceptacle, perforated bushing 12, said packing being divided to permitthe flow of liquid from the receptacle to the shaft, divided gland 10,and swing bolts 4: arranged to cooperate with said gland to compress thepacking and hold the receptacle in place on the shaft.

In testimony whereof, I have hereunto set my hand.

OSCAR H. DORER.

